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  <title>PhotoSwipe: Responsive JavaScript Image Gallery</title>
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  <link href="/static/photoswipe/site-assets/site.css?v=4.1.3-1.0.4" rel="stylesheet" />
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  img {
    -webkit-filter: drop-shadow(10px 10px 10px rgba(0, 0, 0, .5));
    /* Chrome, Safari, Opera */
    filter: drop-shadow(10px 10px 10px rgba(0, 0, 0, .5));
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<!-- Change /upload-target to your upload address -->
<!-- <form action="/upload-target" class="dropzone"></form> -->
<form action="/file-upload" class="dropzone">
  <div class="fallback">
    <input name="file" type="file" multiple />
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</form>
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  <input type="file" name="file" />
</form> -->

  <div class="section section--head">
    <div class="row row--heading">
      <h1>PhotoSwipe<a href="https://github.com/dimsemenov/PhotoSwipe/releases"> v4.1.3</a></h1>
      <p>JavaScript gallery, no dependencies.</p>
    </div>
    <div class="row">
      <div id="demo-test-gallery" class="demo-gallery">
        <a href="/static/img/is09aw777.jpg" data-size="1600x1600" data-med="/static/img/is09aw777.jpg" data-med-size="600x600" data-author="Folkert Gorter" class="demo-gallery__img--main">
          <img src="/static/img/is09aw777.jpg" alt="" />
          <figure>This is dummy caption.</figure>
        </a>
        <a href="/static/img/is09aw777.jpg" data-size="1600x1068" data-med="/static/img/is09aw777.jpg" data-med-size="1024x683" data-author="Samuel Rohl">
          <img src="/static/img/is09aw777.jpg" alt="" />
          <figure>This is dummy caption. It has been placed here solely to demonstrate the look and feel of finished, typeset text.</figure>
        </a>
        <a href="/static/img/is09aw777.jpg" data-size="1600x1067" data-med="/static/img/is09aw777.jpg" data-med-size="1024x683" data-author="Ales Krivec">
          <img src="/static/img/is09aw777.jpg" alt="" />
          <figure>This is dummy caption. It is not meant to be read.</figure>
        </a>
        <a href="/static/img/is09aw777.jpg" data-size="1600x1067" data-med="/static/img/is09aw777.jpg" data-med-size="1024x683" data-author="Michael Hull">
          <img src="/static/img/is09aw777.jpg" alt="" />
          <figure>Dummy caption. It's Greek to you. Unless, of course, you're Greek, in which case, it really makes no sense.</figure>
        </a>

        <a href="https://farm4.staticflickr.com/3920/15008465772_d50c8f0531_h.jpg" data-size="1600x1067" data-med="https://farm4.staticflickr.com/3920/15008465772_383e697089_b.jpg" data-med-size="1024x683" data-author="Thomas Lefebvre">
          <img src="https://farm4.staticflickr.com/3920/15008465772_383e697089_m.jpg" alt="" />
          <figure>It's a dummy caption. He who searches for meaning here will be sorely disappointed.</figure>
        </a>
      </div>
      <!-- <figure class="demo-gallery__title">Demo gallery &middot; 5 photos</figure> -->
    </div>
  </div>
  <!-- <div id="Gallery"> -->
  <div id="demo-test-gallery" class="demo-gallery">
    <div class="gallery-row">
      <a href="/static/img/is09aw777.jpg" data-size="1024x683" class="demo-gallery__img--main"><img src="/static/img/is09aw777.jpg" alt="Image 01" /></a>
      <a href="/static/img/is09aw77b.jpg" data-size="1024x683"><img src="/static/img/is09aw77b.jpg" alt="Image 02" /></a>
      <a href="/static/img/is09aw77e.jpg" data-size="1024x683"><img src="/static/img/is09aw77e.jpg" alt="Image 03" /></a>
      <a href="/static/img/is09aw77b.jpg" data-size="1024x683"><img src="/static/img/is09aw77b.jpg" alt="Image 02" /></a>
      <a href="/static/img/is09aw77e.jpg" data-size="1024x683"><img src="/static/img/is09aw77e.jpg" alt="Image 03" /></a>
      <!-- <a href="/static/img/is09aw77b.jpg" data-size="1024x683"><img src="/static/img/is09aw77b.jpg" alt="Image 02" /></a> -->
      <!-- <a href="/static/img/is09aw77e.jpg" data-size="1024x683"><img src="/static/img/is09aw77e.jpg" alt="Image 03" /></a> -->
    </div>
    <!-- <div class="gallery-row">
      <a href="/static/img/is09aw777.jpg"  class="demo-gallery__img--main"><img src="https://farm4.staticflickr.com/3920/15008465772_383e697089_m.jpg" alt="Image 04" /></a>
      <a href="/static/img/is09aw777.jpg"><img src="https://farm4.staticflickr.com/3920/15008465772_383e697089_m.jpg" alt="Image 05" /></a>
      <a href="/static/img/is09aw777.jpg"><img src="https://farm4.staticflickr.com/3920/15008465772_383e697089_m.jpg" alt="Image 06" /></a>
    </div> -->
  </div>
  <div id="gallery" class="pswp" tabindex="-1" role="dialog" aria-hidden="true">
    <div class="pswp__bg"></div>
    <div class="pswp__scroll-wrap">
      <div class="pswp__container">
        <div class="pswp__item"></div>
        <div class="pswp__item"></div>
        <div class="pswp__item"></div>
      </div>
      <div class="pswp__ui pswp__ui--hidden">
        <div class="pswp__top-bar">
          <div class="pswp__counter"></div>
          <button class="pswp__button pswp__button--close" title="Close (Esc)"></button>
          <button class="pswp__button pswp__button--share" title="Share"></button>
          <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>
          <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>
          <div class="pswp__preloader">
            <div class="pswp__preloader__icn">
              <div class="pswp__preloader__cut">
                <div class="pswp__preloader__donut"></div>
              </div>
            </div>
          </div>
        </div>
        <!-- <div class="pswp__loading-indicator"><div class="pswp__loading-indicator__line"></div></div> -->
        <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
          <div class="pswp__share-tooltip">
            <!-- <a href="javascript:void(0)" class="pswp__share--facebook"></a>
          <a href="javascript:void(0)" class="pswp__share--twitter"></a>
          <a href="javascript:void(0)" class="pswp__share--pinterest"></a>
          <a href="javascript:void(0)" download class="pswp__share--download"></a> -->
          </div>
        </div>
        <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)"></button>
        <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)"></button>
        <div class="pswp__caption">
          <div class="pswp__caption__center">
          </div>
        </div>
      </div>
    </div>
  </div>
  <script type="text/javascript">
  (function() {

    var initPhotoSwipeFromDOM = function(gallerySelector) {

      var parseThumbnailElements = function(el) {
        var thumbElements = el.childNodes,
          numNodes = thumbElements.length,
          items = [],
          el,
          childElements,
          thumbnailEl,
          size,
          item;

        for (var i = 0; i < numNodes; i++) {
          el = thumbElements[i];

          // include only element nodes 
          if (el.nodeType !== 1) {
            continue;
          }

          childElements = el.children;

          size = el.getAttribute('data-size').split('x');

          // create slide object
          item = {
            src: el.getAttribute('href'),
            w: parseInt(size[0], 10),
            h: parseInt(size[1], 10),
            author: el.getAttribute('data-author')
          };

          item.el = el; // save link to element for getThumbBoundsFn

          if (childElements.length > 0) {
            item.msrc = childElements[0].getAttribute('src'); // thumbnail url
            if (childElements.length > 1) {
              item.title = childElements[1].innerHTML; // caption (contents of figure)
            }
          }


          var mediumSrc = el.getAttribute('data-med');
          if (mediumSrc) {
            size = el.getAttribute('data-med-size').split('x');
            // "medium-sized" image
            item.m = {
              src: mediumSrc,
              w: parseInt(size[0], 10),
              h: parseInt(size[1], 10)
            };
          }
          // original image
          item.o = {
            src: item.src,
            w: item.w,
            h: item.h
          };

          items.push(item);
        }

        return items;
      };

      // find nearest parent element
      var closest = function closest(el, fn) {
        return el && (fn(el) ? el : closest(el.parentNode, fn));
      };

      var onThumbnailsClick = function(e) {
        e = e || window.event;
        e.preventDefault ? e.preventDefault() : e.returnValue = false;

        var eTarget = e.target || e.srcElement;

        var clickedListItem = closest(eTarget, function(el) {
          return el.tagName === 'A';
        });

        if (!clickedListItem) {
          return;
        }

        var clickedGallery = clickedListItem.parentNode;

        var childNodes = clickedListItem.parentNode.childNodes,
          numChildNodes = childNodes.length,
          nodeIndex = 0,
          index;

        for (var i = 0; i < numChildNodes; i++) {
          if (childNodes[i].nodeType !== 1) {
            continue;
          }

          if (childNodes[i] === clickedListItem) {
            index = nodeIndex;
            break;
          }
          nodeIndex++;
        }

        if (index >= 0) {
          openPhotoSwipe(index, clickedGallery);
        }
        return false;
      };

      var photoswipeParseHash = function() {
        var hash = window.location.hash.substring(1),
          params = {};

        if (hash.length < 5) { // pid=1
          return params;
        }

        var vars = hash.split('&');
        for (var i = 0; i < vars.length; i++) {
          if (!vars[i]) {
            continue;
          }
          var pair = vars[i].split('=');
          if (pair.length < 2) {
            continue;
          }
          params[pair[0]] = pair[1];
        }

        if (params.gid) {
          params.gid = parseInt(params.gid, 10);
        }

        return params;
      };

      var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {
        var pswpElement = document.querySelectorAll('.pswp')[0],
          gallery,
          options,
          items;

        items = parseThumbnailElements(galleryElement);

        // define options (if needed)
        options = {

          galleryUID: galleryElement.getAttribute('data-pswp-uid'),

          getThumbBoundsFn: function(index) {
            // See Options->getThumbBoundsFn section of docs for more info
            var thumbnail = items[index].el.children[0],
              pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
              rect = thumbnail.getBoundingClientRect();

            return { x: rect.left, y: rect.top + pageYScroll, w: rect.width };
          },

          addCaptionHTMLFn: function(item, captionEl, isFake) {
            if (!item.title) {
              captionEl.children[0].innerText = '';
              return false;
            }
            captionEl.children[0].innerHTML = item.title + '<br/><small>Photo: ' + item.author + '</small>';
            return true;
          },

        };


        if (fromURL) {
          if (options.galleryPIDs) {
            // parse real index when custom PIDs are used 
            // https://photoswipe.com/documentation/faq.html#custom-pid-in-url
            for (var j = 0; j < items.length; j++) {
              if (items[j].pid == index) {
                options.index = j;
                break;
              }
            }
          } else {
            options.index = parseInt(index, 10) - 1;
          }
        } else {
          options.index = parseInt(index, 10);
        }

        // exit if index not found
        if (isNaN(options.index)) {
          return;
        }



        var radios = document.getElementsByName('gallery-style');
        for (var i = 0, length = radios.length; i < length; i++) {
          if (radios[i].checked) {
            if (radios[i].id == 'radio-all-controls') {

            } else if (radios[i].id == 'radio-minimal-black') {
              options.mainClass = 'pswp--minimal--dark';
              options.barsSize = { top: 0, bottom: 0 };
              options.captionEl = false;
              options.fullscreenEl = false;
              options.shareEl = false;
              options.bgOpacity = 0.85;
              options.tapToClose = true;
              options.tapToToggleControls = false;
            }
            break;
          }
        }

        if (disableAnimation) {
          options.showAnimationDuration = 0;
        }

        // Pass data to PhotoSwipe and initialize it
        gallery = new PhotoSwipe(pswpElement, PhotoSwipeUI_Default, items, options);

        // see: http://photoswipe.com/documentation/responsive-images.html
        var realViewportWidth,
          useLargeImages = false,
          firstResize = true,
          imageSrcWillChange;

        gallery.listen('beforeResize', function() {

          var dpiRatio = window.devicePixelRatio ? window.devicePixelRatio : 1;
          dpiRatio = Math.min(dpiRatio, 2.5);
          realViewportWidth = gallery.viewportSize.x * dpiRatio;


          if (realViewportWidth >= 1200 || (!gallery.likelyTouchDevice && realViewportWidth > 800) || screen.width > 1200) {
            if (!useLargeImages) {
              useLargeImages = true;
              imageSrcWillChange = true;
            }

          } else {
            if (useLargeImages) {
              useLargeImages = false;
              imageSrcWillChange = true;
            }
          }

          if (imageSrcWillChange && !firstResize) {
            gallery.invalidateCurrItems();
          }

          if (firstResize) {
            firstResize = false;
          }

          imageSrcWillChange = false;

        });

        gallery.listen('gettingData', function(index, item) {
          if (useLargeImages) {
            item.src = item.o.src;
            item.w = item.o.w;
            item.h = item.o.h;
          } else {
            item.src = item.m.src;
            item.w = item.m.w;
            item.h = item.m.h;
          }
        });

        gallery.init();
      };

      // select all gallery elements
      var galleryElements = document.querySelectorAll(gallerySelector);
      for (var i = 0, l = galleryElements.length; i < l; i++) {
        galleryElements[i].setAttribute('data-pswp-uid', i + 1);
        galleryElements[i].onclick = onThumbnailsClick;
      }

      // Parse URL and open gallery if it contains #&pid=3&gid=1
      var hashData = photoswipeParseHash();
      if (hashData.pid && hashData.gid) {
        openPhotoSwipe(hashData.pid, galleryElements[hashData.gid - 1], true, true);
      }
    };

    initPhotoSwipeFromDOM('.demo-gallery');

  })();
  </script>
</body>

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